coverity 160166 readlink doesnt NUL terminate
coverity 160166 readlink doesnt NUL terminate

Ah a real bug... well done coverity, that could have been nasty.

readlink unusually doesn't NUL terminate the result... take care about it.

Signed-off-by: Andy Green <e3579b1e47f273529f0f929453e939a68ede9fd1@warmcat.com>
sartura/libwebsockets,sartura/libwebsockets,sartura/libwebsockets,sartura/libwebsockets,sartura/libwebsockets,sartura/libwebsockets,sartura/libwebsockets